A CO2 table has fixed hold times and decreasing rest times. It causes CO2 to build up in your blood, training your tolerance to the 'air hunger' sensation.

An O2 table has fixed rest times and increasing hold times. It depletes your oxygen levels, training your body to conserve energy.

Generally yes, but NEVER practice breath holding in water alone. Always practice these tables dry (on a couch or bed). Shallow Water Blackout is a real risk if done in water.

Breath Trainer

Breath Trainer Overview

Generate CO2/O2 apnea training tables

The Breath Holding Trainer allows you to generate custom static apnea training tables (CO2 and O2). These tables are the gold standard for increasing breath-hold time for freedivers, surfers, and swimmers. CO2 Tolerance tables teach your body to ignore the 'urge to breathe', while O2 Deprivation tables train your body to function efficiently with low oxygen. Enter your Personal Best (PB) to generate a program tailored to your limit.

How to Use Breath Trainer

Enter your Max Breath Hold (PB) time.
Generate the tables.
Use the stopwatch to follow the CO2 or O2 schedule.
Breathe normally during rest, hold during work.

Frequently Asked Questions

What is a CO2 table?: A CO2 table has fixed hold times and decreasing rest times. It causes CO2 to build up in your blood, training your tolerance to the 'air hunger' sensation.
What is an O2 table?: An O2 table has fixed rest times and increasing hold times. It depletes your oxygen levels, training your body to conserve energy.
Is this safe?: Generally yes, but NEVER practice breath holding in water alone. Always practice these tables dry (on a couch or bed). Shallow Water Blackout is a real risk if done in water.

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